Occasionally, randomly, and of varying duration, I am unable to fight. I cannot use a light, heavy, or skill bar skill, nor even use a quick slot item. I can move freely, dodge, and run around until the "event" is over. It can happen at the start of a fight, in the middle, or who knows where. It happens overland, in delves, and in public dungeons. It happens with solo mobs, multi mobs, including animals. Since my character has 20k+ health, I can usually run around until I regain function, but occasionally it actually last long enough for an ordinarily puny 2-3 mobs to kill me. It can last a few seconds, up to 20 seconds.
I must say I am disgusted by the ticket process where at the end it says, slight paraphrase "Don't expect a reply, if we need something we will contact you."